body {
	height: 320px;
	text-align: center;
	border-style: solid;
	border-color: #aa0000;
	margin-left: 0px;
	margin-top: 0px;
}

#screen {
	width: 280px;
	height: 30px;
	margin-top: 30px;
	margin-bottom: 30px;
	float: left;
}

#box {
	width: 30px;
	height: 30px;
	left: 150px;
	background-color: tomato;

	position: relative;
	-webkit-transition-duration: 0s;
	-webkit-transition-timing-function: ease;
}

#wall {
	width: 10px;
	height: 40px;
	background-color: #330000;
	margin-top: 20px;
	margin-bottom: 30px;
	float: left;
}
